You have to stick to the club's code of conduct as Sancho has found out.to his cost.
Dortmund have come down hard on him because 'Kicker' say that Lucien Favre was not at all happy that Jadon Sancho returned later than planned to Dortmund to prepare for Saturday's game. As a result, he has dropped the England international for the game and fined him.
"Jadon is a great player, there's no doubt about that, but he still has a lot to learn," Favre commented briefly in the press conference prior to the match.
Two seasons ago, after joining several training sessions late, Jadon Sancho was relegated to the Under 23 side, so Dortmund punished him severely this time.